Directories as well as Services require the ip http server to be enabled and if it's not a Host not found message appears on the screen once Directories or Services buttons pressed.
Quite useful directory related service dnis dir-lookup command is only has influence on called number, not the calling one, which actually confuses a bit. Why do we need it?
For example you are the call center serving plenty of different customers and each customer knows one of your numbers so in order to let the operator know what customer calling him right now we can use below configuraration:
telephony-service
directory entry 1 555777111 name Customer 1
directory entry 2 555777222 name Customer 2
directory entry 1 555777333 name Customer 3
service dnis dir-lookup
And if a customer dials 555777111 operator will see calling number on the screen as usual, but he also will see Customer 1 message at the bottom, so that he can prepare himself and answer in the proper way.
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